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Author	Topic: 4V heads with small valves
Mpcoluv Gearhead Posts: 928 From: Charlotte NC usa Registered: Apr 2001	posted 10-20-2001 09:22 AM I was recently given a open chamber D3xxx 4V cleveland head. I thought I would now have a complete set of open chamber heads to sell. I checked the valve sizes for the free on and it had 2V valves in it. 2.04"/1.65" My question is, do these heads have any better velocity than the standard 4V heads? I have heard superstock guys run these heads for better low end torque. Anyone have any info? IP: Logged
Moneymaker Administrator Posts: 19686 From: Lyons, IL, USA Registered: May 99	posted 10-21-2001 12:35 AM Smaller valves with the right cam will make a lot more low end on a 351C. ------------------ Alex Denysenko Co-Administrator and Moderator NHRA/IHRA/SRA member NHRA and IHRA SS/LA National Record Holder '00 & '01 Fleet of FoMoCo products Moneymaker Bio US Class Nationals link IP: Logged
Mpcoluv Gearhead Posts: 928 From: Charlotte NC usa Registered: Apr 2001	posted 10-21-2001 08:31 AM quote: Originally posted by Moneymaker: Smaller valves with the right cam will make a lot more low end on a 351C. Will the open chambers desire to spar knock reduce power elsewhere? Ideally, well a fantasy lets say...you could weld up the open chambers and grind them into any shape you wanted I guess. I have heard of guys using some sort of insert into the bowl area of standard 4V heads and running smaller valves. Is this possible? IP: Logged
Moneymaker Administrator Posts: 19686 From: Lyons, IL, USA Registered: May 99	posted 10-21-2001 10:20 AM Sure it's possible, but VERY cost prohibitive. ------------------ Alex Denysenko Co-Administrator and Moderator NHRA/IHRA/SRA member NHRA and IHRA SS/LA National Record Holder '00 & '01 Fleet of FoMoCo products Moneymaker Bio US Class Nationals link IP: Logged
Clevo377 Gearhead Posts: 312 From: Blackburn, Victoria, Australia Registered: Nov 2000	posted 10-22-2001 12:32 AM I thought all 4V cleveland heads came with the large (2.19) valves?? Paul IP: Logged
Mpcoluv Gearhead Posts: 928 From: Charlotte NC usa Registered: Apr 2001	posted 10-22-2001 07:14 AM quote: Originally posted by Clevo377: I thought all 4V cleveland heads came with the large (2.19) valves?? Paul Apparently a few of the 1973 heads had the 2V valve sizes. These heads carry the same casting numbers as the 1973 big valve heads. I guess they just ran them through the 2V tooling at the factory. IP: Logged

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